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HJ 25.2-2014

Chinese Standard: 'HJ 25.2-2014'
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Standard ID HJ 25.2-2014 (HJ25.2-2014)
Description (Translated English) Technical guidelines for environmental site monitoring
Sector / Industry Environmental Protection Industry Standard
Classification of Chinese Standard Z10
Word Count Estimation 16,175
Date of Issue 2014/2/19
Date of Implementation 2014/7/1
Older Standard (superseded by this standard) HJ/T 25-1999
Quoted Standard GB 3095; GB 5085.1; GB 5085.2; GB 5085.3; GB 5085.4; GB 5085.5; GB 5085.6; GB 5085.7; GB 14554; GB 50021; HJ/T 20; HJ/T 91; HJ/T 164; HJ/T 166; HJ/T 194; HJ/T 298; HJ 493; HJ 25.1; HJ 25.3; HJ 25.4
Drafting Organization Shanghai Academy of Environmental Sciences; Shenyang Institute of Environmental Sciences; Standards Institute for Environmental; Environmental Protection Research Institute of Light Industry; Nanjing Institute of Environmental Sciences Department of Envir
Administrative Organization Ministry of Environmental Protection
Regulation (derived from) Ministry of Environmental Protection Notice No. 14 of 2014
Issuing agency(ies) Ministry of Environmental Protection
Summary This standard specifies the principles of site environmental monitoring program, work content and technical requirements. This standard applies to site environmental investigation, environmental monitoring, risk assessment, and soil remediation of contami

HJ 25.2-2014
Technical guidelines for environmental site monitoring
People's Republic of China national environmental protection standards
Replacing HJ/T 25-1999
Site Environmental Monitoring Technology Guidelines
Posted on.2014-02-19
2014-07-01 implementation
Ministry of Environmental Protection released
Foreword ..II
1 scope of application .1
2 Normative references .1
3 Terms and definitions .1
4 basic principles, work content and working procedures .2
5 Monitoring Plan 2
6 monitoring points layout 4
7 Sample Collection .8
8 Sample Analysis 10
9 Quality Control and Quality Assurance .10
10 Monitoring Report Preparation .11
In order to carry out "Environmental Protection Law of the People's Republic of China", protect the ecological environment, protect human health and strengthen the pollution field
To environmental supervision and management, standardize site environmental monitoring, the development of this standard.
This standard and the following standards belong to the same series of environmental protection sites contaminated sites.
Technical Guidelines for Site Environmental Investigation (HJ 25.1-2014);
Technical Guidelines for Risk Assessment of Contaminated Sites (HJ 25.3-2014);
Guidelines for Remediation of Contaminated Sites Soil (HJ 25.4-2014).
Since the implementation of the above standards, "Industrial Enterprises Soil Environmental Quality Risk Assessment Benchmark" (HJ/T 25-1999)
This standard specifies the site environmental monitoring principles, procedures, work content and technical requirements.
This standard is formulated by the Ministry of Environmental Protection Science and Technology Standards Division.
This standard is mainly drafted by. Shenyang Institute of Environmental Sciences, Environmental Research Institute of Environmental Protection Department, Light Industry Ring
Environmental Protection Institute, Ministry of Environmental Protection Nanjing Institute of Environmental Sciences, Shanghai Academy of Environmental Sciences.
This standard MEP approved on February 19,.2014.
This standard since July 1,.2014 implementation.
This standard is interpreted by the MEP.
Site Environmental Monitoring Technology Guidelines
1 scope of application
This standard specifies the site environmental monitoring principles, procedures, work content and technical requirements.
This standard applies to the site environment survey, risk assessment, as well as contaminated sites soil remediation project environmental supervision, engineering
Acceptance, retrospective assessment of the process of environmental monitoring.
This standard does not apply to the site of radioactive and pathogenic biological contamination monitoring.
2 Normative references
This standard references the following documents in the terms. For undated references, the effective version applies
In this standard.
GB 3095 ambient air quality standards
GB 5085 hazardous waste identification standards
GB 14554 Odor pollutant emission standards
GB 50021 Geotechnical Engineering Exploration Code
HJ/T 20 Industrial solid waste sampling Sampling specifications
HJ/T 91 Technical Specifications for Surface Water and Sewerage Monitoring
HJ/T 164 Groundwater Environmental Monitoring Technical Specifications
HJ/T 166 Soil Environmental Monitoring Technical Specifications
HJ/T 194 Environmental Air Quality Manual Monitoring Technical Specifications
HJ/T 298 Hazardous Waste Identification Technical Specifications
HJ 493 Technical Specifications for the Preservation and Management of Water Quality Samples
HJ 25.1 Site Environmental Investigation Technical Guidelines
HJ 25.3 Technical Guidelines for Risk Assessment of Contaminated Sites
HJ 25.4 Guidelines for Soil Remediation in Contaminated Sites
3 Terms and definitions
The following terms and definitions apply to this standard.
3.1 site site
Soil, groundwater, surface water and the total amount of all structures, facilities and living things within a parcel
3.2 contaminated sites contaminated site
After investigation and risk assessment of potential contaminated sites, it is confirmed that pollution hazards exceed human health or ecological environment
By the risk level of the site, also known as contaminated land.
3.3 concerned about pollutants contaminant of concern
According to the pollution characteristics of the site and the stakeholders' opinions, identify the pollutants that need to be investigated and risk assessment.
3.4 soil mixed soil mixture sample
Refers to the surface or the same layer of soil after mixing the soil samples, composed of mixed sample points should be 5 to 20 points.
4 basic principles, work content and working procedures
4.1 The basic principle
4.1.1 Targeted principles
Environmental monitoring of contaminated sites should focus on environmental investigation and risk assessment, remediation, project acceptance and retrospective assessment
The purpose and requirements of environmental management in each stage are to ensure the representativeness, accuracy and timeliness of the monitoring results.
Environment management to provide the basis.
4.1.2 Normative principle
To standardize the basic principles, working procedures and work to be followed in environmental monitoring of contaminated sites in a procedural and systematic manner
Method to ensure the scientific and objectivity of environmental monitoring of contaminated sites.
4.1.3 Feasibility Principle
In meeting the investigation and risk assessment of contaminated sites environmental monitoring, remediation, project acceptance and retrospective assessment of the various stages of supervision
Under the conditions of test requirements, considering the monitoring costs, the level of technical application and other factors, to ensure that monitoring work is feasible
And follow-up work smoothly.
4.2 work content
4.2.1 site environment survey and monitoring
Site environment survey and risk assessment process of environmental monitoring, the main task is to monitor the use of soil to identify
Sewage, surface water, ambient air, residual pollutants and hydrogeological features of concern, and a comprehensive analysis of the
Set the type of pollutants, pollution levels and pollution.
4.2.2 contaminated site management repair monitoring
The main work of environmental monitoring in the process of remediation of contaminated sites is to address the implementation of various technical measures for remediation and treatment
Results related to the monitoring, including the repair of the project involved in environmental protection quality monitoring and secondary pollutants
Emissions monitoring.
4.2.3 contaminated site repair project acceptance monitoring
After the completion of the environmental monitoring of the remediation of contaminated sites, the main work is to assess and evaluate the remediation field
Whether or not the site has reached the identified remediation goals and engineering design requirements.
4.2.4 contaminated sites retrospective assessment of monitoring
After the contaminated site has been checked and rehabilitated by the project, within a specified time frame,
Groundwater, surface water and environmental air environmental monitoring carried out by the environmental monitoring, but also for long-term venue for the original position
Manage the effect of restoration engineering measures Carry out a confirmatory environmental monitoring.
4.3 working procedures
The working procedures of environmental monitoring of contaminated sites mainly include the content of monitoring, the making of monitoring plan, the implementation of monitoring and supervision
Test report preparation. Monitoring content is determined to start monitoring in accordance with the requirements of 4.2 to determine the specific work content; monitoring plan
Develop data collection and analysis, determine the scope of monitoring, monitoring media, monitoring projects and monitoring organization of work;
Measurement implementation includes monitoring site layout, sample collection and sample analysis.
5 monitoring plan
5.1 data collection and analysis
According to the site environmental survey results, taking into account the contaminated site management and repair monitoring, project acceptance monitoring, retrospective evaluation
Assessment of the purpose and requirements of each stage of monitoring to determine the various stages of monitoring should be collected contaminated site information, including the site
Information obtained during the environmental investigation phase and information collected during each phase of the monitoring.
5.2 monitoring range
5.2.1 Site Environmental Surveys The monitoring scope is the scope of the site boundary initially determined by the previous environmental survey.
5.2.2 Remediation of Contaminated Site The scope of remediation monitoring shall include the site remediation area as determined in the design of remediation and remediation works, and
Remediation of wastewater, waste gas and waste affected areas.
5.2.3 contaminated site repair project acceptance monitoring range should be consistent with the scope of remediation of contaminated sites.
5.2.4 Retrospective Assessment of Contaminated Sites The monitoring scope shall include environmental impacts that may cause groundwater, surface water and ambient air
The scope of the ringing and the range of areas that may be affected by long-term remediation of the site.
5.3 monitoring object
The main monitoring object is soil, and groundwater, surface water and ambient air should be included when necessary.
5.3.1 Soil
The specific depth of the soil, including the topsoil and deep soil, topsoil and deep soil within the site, should be determined according to
Site environmental survey concluded. The hardened or backfilled layers present in the site are generally available as topsoil.
5.3.2 Groundwater
Groundwater is mainly groundwater within the boundary of the site or shallow groundwater flowing to the downstream catchment area through the site. in
Areas with heavy pollution and geological structures that favor the transport of contaminants to deeper soil cover the deep groundwater.
5.3.3 Surface water
Surface water is mainly the surface water flowing through or pooling in the boundary of the site, and should also be considered for the contaminated sites
Surface water downstream collection area.
5.3.4 Ambient air
Ambient air refers to the air in the center of the contaminated area of the site and the air in the main environmentally sensitive point of the wind in the site.
5.3.5 Residual waste
Site monitoring of environmental monitoring should also consider the site of residual waste, including the site of the original production of the original
Materials, industrial waste, waste chemicals and their contaminants, solid and semi-solid residues in abandoned facilities, vessels and pipelines
And liquid substances, other solid substances that have obvious differences with the local soil characteristics.
5.3.6 Site Governance The object of monitoring and restoration should also include the control of substances emitted during the remediation process, such as waste gas, waste water and waste
5.4 Monitoring Project
5.4.1 site environment survey monitoring project site environment survey The initial sampling and monitoring project should be based on previous conclusions of the stage of environmental investigation and this phase of the work plan
Determine, in accordance with the specific requirements of HJ 25.1 OK. Hazardous waste monitoring projects that may be involved should refer to GB 5085
Relevant indicators to determine. Site Environment Investigation Detailed sampling and monitoring projects include site-specific pollutants and site characteristics
Number should be determined according to HJ 25.1 related requirements.
5.4.2 Pollution Site Management and Repair, Project Acceptance and Retrospective Evaluation Monitoring Project soil monitoring project for risk assessment to determine the need for remediation of the indicators. Groundwater, surface water and the environment
Air monitoring projects should be based on the technical requirements for remediation. The monitoring project should also consider the contaminated sites that may be generated in the process of remediation of contaminated sites,
Remedy technical requirements to determine repair, see HJ 25.4 in the relevant requirements.
5.5 Monitoring Organization of work
5.5.1 Monitoring division of labor
The division of work in monitoring generally includes information collection and consolidation, monitoring plan preparation, monitoring site layout, sample collection and
Site analysis, sample laboratory analysis, data processing, monitoring report preparation. Commitment units should be organized according to the monitoring mission
Good division of labor within the unit and the division of responsibilities between units.
5.5.2 Preparation for monitoring
The preparations for monitoring generally include the division of labor, the collection and sorting of information, the preparation of work plans, the standard of personal protection
Preparation, site reconnaissance, sampling equipment and containers and analytical equipment preparation.
5.5.3 Monitoring the implementation of the work
The implementation of the monitoring work mainly includes the layout of monitoring points, sample collection, sample analysis, and subsequent data processing
And report preparation. Under normal circumstances, the implementation of monitoring is the core of distribution sampling, it should promptly implement the site distribution
Kind of related working conditions. In the sample collection, preparation, transportation and analysis process, should take the necessary technical and management
Measures to ensure the safety of monitoring personnel.
6 monitoring points layout
6.1 monitoring point layout method
6.1.1 soil monitoring point layout method
According to the environmental conditions of the venue to determine the relevant conclusions of the geographical location, site boundaries and various stages of work requirements, determine the distribution
range. In the area map or layout plan marked accurate geographical location, draw the site boundary, and the corner of the field into
Line accurate positioning. Monitoring sites commonly used in soil environment monitoring of contaminated sites include the systematic random placement method, the system
Cloth distribution method and the district distribution method, see Figure 1.
Figure 1 monitoring points layout method diagram For sites with similar soil characteristics, the same land use function of the area, the system can be used randomly distributed method
Monitoring points of the layout.
1) The system random distribution method is to divide the monitoring area into several parcels of equal area, from which random
You can use the dice, lottery, random number table method) to extract a certain number of plots in each plot layout of a
A monitoring point.
2) The number of samples taken should be determined according to site area, monitoring purposes and site usage. If the soil pollution characteristics of the site is not clear or the original condition of the site is severely damaged, the system can be used for monitoring
Point layout. The system placement method divides the monitoring area into several parcels of the same area, and one monitoring per parcel
Point. For venues with different land use functions and different pollution characteristics, the zoning method may be adopted
Monitoring points of the layout.
The system of random distribution system distribution method distribution method
1) Zoning distribution method is to divide the site into different areas, and then determine the layout of the area according to the area or pollution characteristics
2) The division of land use function within the site is generally divided into production area, office area and living area. In principle, the production area
Block division should be based on the structure or production process as a unit, including the workshop, raw materials and product storage, waste water treatment and waste
Slag storage yard, venue materials circulation roads, underground storage structures and pipelines. Office area including office buildings, squares,
Roads, green spaces, etc. Living areas include canteens, dormitories and public buildings.
3) For production areas with similar functions of land use and smaller unit area, several units may also be combined into one monitoring site
Piece. soil control monitoring points laying method
1) In general, soil control monitoring points should be set in the external area of the site.
2) The control monitoring points can be selected in the four vertical axes of the external area of the site, with equal spacing in each direction. 3
A sampling point, respectively, for sampling and analysis. As a result of topography, land use patterns, the characteristics of diffusion and migration of pollutants and other factors
Vegetation makes obvious differences in soil characteristics or sampling conditions are limited, the monitoring points can be adjusted according to the actual situation.
3) Control monitoring points should be selected as far as possible in a certain period of time without the disturbance of the exposed soil, the surface soil should be collected
Samples, sampling depth as far as possible with the surface soil sampling depth. Deep soil samples should also be collected if necessary.
6.1.2 groundwater monitoring point layout method
Groundwater within the site shall be distributed in areas suspected of being seriously polluted, taking into account the groundwater runoff in the site
Downstream distribution. If we need to understand the pollution characteristics of the site through the monitoring of groundwater, the runoff of groundwater within a certain distance
Lower catchment area distribution.
6.1.3 Surface water monitoring points laying method
If there is flowing or pooling of surface water within the site, the surface water in the area suspected of being seriously polluted shall be distributed at the same time
Consider the downstream distribution of surface water runoff.
6.1.4 Ambient air monitoring point layout method
Venues and venues were exposed to the major environmental sensitive points at the time. For the workshop that exists in the site, the original
Materials or waste storage sites and other areas with more concentrated pollution should be deployed in these areas; for organic pollution, foul odor
Dyeing, mercury pollution and other types of venues should be located in areas suspected of heavy pollution distribution.
6.1.5 site waste disposal monitoring points laying method
In areas where suspicious wastes are considered hazardous wastes and suspicious substances that are clearly distinguishable from the characteristics of the local soil
Row distribution.
6.2 site environment survey monitoring site layout
6.2.1 soil monitoring site layout site environment survey preliminary sampling and monitoring points of the layout
1) According to the original site use features and pollution characteristics, select the possible pollution of some of the land mass, as soil pollution
Identification of the land for monitoring. In principle, monitoring sites should be selected in the center of the block or have obvious pollution sites, such as production cars
Between, sewage pipes, waste dumps and so on.
2) For sites with more uniform pollution (including the type of pollutants and degree of pollution) and areas with severe landform destruction
Including demolition destruction, the historical change of destruction), according to the shape of the site using random distribution method, in each plot
Center sampling.
3) The number of monitoring points and sampling depth should be based on the site area, type of pollution and the use of different functional areas of the survey
Conclusion is confirmed.
4) For each monitoring plots, the vertical level of topsoil and deep soil should be divided according to the level of pollutants
Moving conditions, damage to structures and pipelines, soil characteristics and other factors. Sampling depth should be deducted from non-soil surface hardening
Layer thickness, in principle, it is recommended that the sampling interval of deep soil within 3m is 0.5m, sampling interval of 3m ~ 6m is 1m, 6m to
Groundwater sampling interval of 2m, the specific interval can be adjusted according to the actual situation.
5) In general, the sampling depth of deep soil should be determined according to the site environmental survey findings and site conditions, the maximum
Depth should be until the depth of uncontaminated. site environment survey detailed sampling monitoring site layout
1) For sites with more uniform pollution (including the type of pollutants and degree of pollution) and sites with severe landform destruction
Including demolition destruction, historical alteration damage), the system can be used to monitor the distribution of distribution points in the center of each plot
2) If there is a significant difference in the function or characteristics of pollution in different areas of the site, the original
Use features and pollution characteristics and other information, the use of zoning distribution of monitoring plots, sampling in the center of each plot.
3) The area of a single monitoring plot can be determined according to the actual situation and in principle should not exceed 1600 m2. For more area
Small sites should be no less than 5 monitoring plots. The sampling depth should be the maximum depth determined by the initial sampling and monitoring of the environmental survey
Degree, depth interval see in the relevant requirements.
4) If it is necessary to collect soil mixed samples, it can be divided into 1 ~ 9 according to the pollution degree and plot area of each monitoring plot
A grid of equal area is sampled at each grid center to make a mixture of soil samples in the same layer (Volatile Organic Compounds
Contaminated sites).
6.2.2 groundwater monitoring point layout
1) For the groundwater flow and groundwater level, can be combined with the environmental findings at a distance of a certain distance by triangle or quadrilateral
Arrange at least 3 ~ 4 points monitoring judgment.
2) Groundwater monitoring points should be laid along the groundwater flow, which may flow upstream and the groundwater may be more polluted
Heavy area and groundwater flow to the downstream were deployed monitoring points. Determine the extent of groundwater pollution and pollution should be referred to
Detailed monitoring stage soil monitoring points, determined according to the actual situation, and in the heavily polluted area encryption distribution.
3) The depth of the monitoring well should be determined according to the purpose of monitoring, the type of aquifer in which it is located and its depth and relative thickness, and not
Penetrating shallow groundwater floor. Groundwater monitoring target layer and other aquifers should have good water-stop.
4) Under normal circumstances, the sampling depth should be below 0.5m below the monitoring well surface. For low-density water-insoluble organic pollution
Dyeing, monitoring points should be set at the top of the aquifer; for high-density water-insoluble organic pollution, monitoring points should be set at
Aquifer bottom and impermeable layer top.
5) In general, a control well should be located at a distance upstream of groundwater flow.
6) If the site area is larger, the groundwater is more polluted and the groundwater is richer,
Tour and downstream each additional 1 or 2 monitoring wells.
7) If there is no qualified shallow groundwater monitoring well in the site, according to the conclusion of the investigation,
Distribute monitoring wells downstream.
8) If the site has a shallow underground rock formation and no shallow groundwater enrichment, then underground in the downstream direction of runoff
Pipes laid monitoring wells.
9) If the shallow groundwater monitored in the previous period is very polluted and there is deep groundwater,
Under the conditions of a deep to deep groundwater to assess the groundwater pollution situation.
6.2.3 Surface water monitoring point layout
1) When examining the effects of surface runoff from contaminated sites on surface water, they can be collected during rainfall and non-rainfall period respectively
kind. If it is necessary to reflect the impact of site pollution sources on the surface water, according to the surface water flow in the dry season, wet season, peace
Water sampling.
2) While monitoring the concentration of pollutants, the runoff of surface water should also be monitored to determine the migration of pollutants to surface water
Shift amount.
3) If necessary, set up a control monitoring point at a certain distance upstream of the surface water.
4) The specific monitoring points laying requirements refer to HJ/T 91.
6.2.4 Ambient air monitoring point layout
1) If it is necessary to determine the level of ambient air pollution in the venue, it may be suspected that the contaminated area center is located at the site according to the actual situation. When
Nowadays, the monitoring sites will be laid at the site of the site and the major environmental sensitive spots within 500m beyond the boundary,
Surface 1.5 ~ 2.0m.
2) Under normal circumstances, the control site should be set up in the upwind of the contaminated site.
3) For sites of organic pollution, mercury pollution and other types of pollution, especially VOCs, if necessary, choose
The most polluted area of the center of the block, peel surface soil 0.2m above the surface of the ambient air sampling monitoring.
6.2.5 site waste monitoring site layout
1) During the preliminary sampling and monitoring stage of site environment investigation, the residual waste that may be hazardous wastes should be based on the previous survey results
Dumps are sampled directly.
2) During the detailed sampling and monitoring stage of the site environment investigation, the hazardous waste that has been identified as hazardous waste shall be in accordance with HJ/T 298
Seek spot sampling; systematic sampling of suspicious residues sampling should be the same or similar characteristics of each residue
Divide into equal portions and sample each to determine the amount and spatial distribution of residual waste.
6.3 contaminated site management repair monitoring site layout
6.3.1 Surveillance of Residual Hazardous Wastes and Residues with Hazardous Waste Characteristics of Soil Cleansing At the end of the cleanup of residual hazardous wastes and soil with hazardous waste characteristic of the site,
Soil sampling points. According to the characteristics and size of the interface, it is divided into several parcels of equal area,
Over 100m2. Nine topsoil samples can be evenly distributed in each plot to make a mixed sample (Volatile
Organic sample items except). If the monitoring results still exceed the corresponding control target value, the boundary of the secondary cleaning should be determined according to the monitoring result, and the secondary
Clean up again after monitoring, until the clean up to the standard. Residual Hazardous Waste and Hazardous Waste Characteristics The results of the monitoring of the effectiveness of soil cleaning can be used as repair acceptance
Part of the fruit
6.3.2 monitoring of soil cleaning effect of contaminated soil The monitoring of the interface after the completion of the cleaning of contaminated soils, including the four sides and the bottom of the interface. According to the size of the block and
The intensity of pollution should be equally divided into four sides of the side, the maximum length of each paragraph should not exceed 40m, uniform collection of 9
A top soil sample made of mixed samples (volatile organic compounds except for the sample); The bottom is divided into blocks, single
The maximum area of the block should not exceed 400m2, 9 surface soil samples were evenly distributed in each plot to make a mixture
Sample (except volatile organic compounds) For the exceeding area, determine the boundary of secondary excavation according to the monitoring result and conduct monitoring again after secondary excavation until
Meet the corresponding requirements. The monitoring of the effect of soil cleaning on contaminated soil can be used as an integral part of the acceptance test results of the restoration project.
6.3.3 monitoring of contaminated soil remediation Governance The repair process monitoring points or monitoring frequency, should be based on engineering design in situ governance repair workers
Art and technical requirements to determine, each sample represents the soil volume should not exceed 500m3. Disposal monitoring should be carried out on substances that may be discharged during the process of remediation, such as setting up wastewater during the process of remediation and remediation,
Exhaust port should be placed in the discharge port monitoring points.
6.3.4 Governance During the repair, if groundwater, surface water and ambient air are to be monitored, the monitoring points should be in accordance with
Environmental impact assessment or repair engineering design layout.
6.4 contaminated site repair project acceptance monitoring site layout
6.4.1 After the soil in the site of remediation for inspection and acceptance monitoring, the system should be used to lay the monitoring point distribution method,
In principle, the area of each monitoring plot should not exceed 1600 m2, and also refer to the monitoring points of the detailed sampling and monitoring phase of the environmental survey
Bit layout.
6.4.2 The monitoring of the effect of in-situ treatment and restoration engineering measures (such as isolation, anti-migration and diffusion, etc.) should be based on engineering design
Relevant requirements for monitoring the deployment of points.
6.4.3 On-site monitoring and treatment of ectopic remediation engineering measures to monitor the effect of soil after treatment should be laid a certain number of monitoring points,
The soil volume represented by each sample should not exceed 500 m3.
6.4.4 During the process of project acceptance monitoring, if it is found that the land that has not reached the goal of remediation and remediation should be repaired after secondary remediation
Perform project acceptance monitoring again.
6.4.5 Groundwater, surface water and ambient air monitoring, monitoring points, respectively, and 6.2.2,6.2.3,6.2.4 of the prison
The same measuring points can be considered in situ repair project related to the appropriate additional monitoring points.
6.4.6 Acceptance monitoring of groundwater, monitoring wells that can be constructed using the site environmental survey, evaluation and restoration process are available
The number of original monitoring wells should not exceed 60% of the total number of monitoring wells at the time of acceptance. The newly added monitoring wells are located in the most seriously polluted groundwater
Heavy area.
6.5 Polluted site retrospective assessment of monitoring site layout
6.5.1 Periodic retrospective assessment of soil monitoring, environmental monitoring should take into account the detailed sampling and monitoring, governance and rehabilitation supervision
Testing and project acceptance monitoring points related to the monitoring site layout.
6.5.2 Regular monitoring of groundwater, surface water and ambient air can be done according to 6.2.2, 6.2.3 and 6.2.4
Monitoring point layout method.
6.5.3 The monitoring of the effect of in-situ treatment and restoration engineering measures (such as isolation, anti-migration and diffusion, etc.) should be directed against the engineering design
The relevant requirements of the monitoring site layout.
6.5.4 Long-term management A certain number of monitoring points should also be laid out in the area that may be affected by the restoration project.
7 sample collection
7.1 Soil sample collection
7.1.1 Collection of surface soil samples Surface soil samples are generally collected by excavation methods, usually using spade, shovel and bamboo and other simple tools,
Drilling can also be sampled. Basic requirements for soil sampling To minimize soil disturbances and to ensure that soil samples are not contaminated during sampling
7.1.2 Collection of deep soil samples Deep soil sampling to the main sampling hole, but also can be used to sample the way to explore. Drilling Sampling Sampling may be performed manually or mechanically after drilling. Manual drilling sampling equipment, including thread drilling, pipe drilling,
Tubular samplers and more. Mechanical drilling, including solid auger, hollow auger, casing drilling and so on. Trenching Typically, the trough is excavated manually or mechanically and then sampled with a sampling shovel or sampling knife. Slotted section
A strip-shaped, according to the type of venue and the number of samples to set a certain width of the section. Tank probe sample can be obtained by hammering the exposed earth
Sampling and artificial carving lump soil sampling.
7.1.3 In-situ Management Rehabilitation Engineering measures the collection of soil samples
Monitoring and sampling of the results of in situ remediation and engineering measures (such as receiving earth, isolation, anti-migration and diffusion, etc.) should be based on
Engineering design requirements put forward.
7.1.4 Volatile organic matter pollution, decomposition of organic matter pollution, odor contaminated soil sampling, should be used without disturbance
Sampling methods and tools. Borehole sampling can be fast-hit method, quick-press method and rotary method, the main tools include soil
Undisturbed earth loaders and rotary loaders. Tank exploration can be cut by artificial carving lump soil samples. Sample immediately sealed into the sample
Container to reduce the exposure time.
7.1.5 If it is necessary to collect mixed soil samples, soil samples
Mixed samples. Volatile, decomposable and malodorous samples must be individually sampled and the sample must not be homogenized
Reason, shall not collect mixed samples.
7.1.6 Conservation and circulation of soil samples Volatile organic contaminated soil samples and malodorous contaminated soil samples should be sealed with a sampling bottle package,
The sample should fill the entire space of the container; the sample to be determined containing easily decomposable organic matter may take appropriate sealing measures
Alcohol or water liquid seal, etc. stored in the sampling bottle). Samples should be placed in the low temperature environment below 4 ℃ (such as refrigerators) shipped
Lose, save, avoid transportation, loss of volatilization in the process of storage, to the laboratory as soon as possible after the analysis and testing. Samples with higher VOC concentrations should be sealed in plastic bags after bottling to avoid cross-contamination and should be transported
Empty a blank to control cross-contamination during shipping and storage. Specific soil samples shall be stored and transferred in accordance with the requirements of HJ/T 166.
7.2 Groundwater sample collection
7.2.1 Groundwater sampling should be based on the site's hydrogeological conditions, combined with the sources of pollution and contaminated soil survey
Signature, the lowest sampling frequency should be used to obtain the most representative samples.
7.2.2 Monitoring wells can be hollow drill pipe thread drilling, direct rotary drilling, direct air rotary drilling, wire rope casing direct rotation
Drilling, double-wall reverse circulation drilling drilling.
7.2.3 When setting up the monitoring well, it should avoid the use of external water and fluid, and take the seepage control measures at the surface wellhead.
7.2.4 Monitoring wells well tube material should have a certain strength, corrosion resistance, no pollution to groundwater.
7.2.5 low-density samples of water-insoluble organic samples using adjustable sampling depth sampling device for high-density non-aqueous
Samples of organic matter can be collected using a sampler or submersible sampler with adjustable sampling depth.
7.2.6 After the construction of monitoring well is completed, it is necessary to conduct well flushing. All contaminants or formation damage from well drilling comes from
Fine particles of natural rock must be removed to ensure that there is no particles in the flowing groundwater. Common methods include excess
Pumping, recoil, draw and gas wash and so on.
7.2.7 Groundwater sampling should be carried out two hours after flushing is appropriate. Volatile organic compounds in the test items should be appropriately reduced
Slow flow, to avoid the impact of bubbles, generally not more than 0.1L/min.
7.2.8 The control sample for groundwater sampling should be at the same depth as the target sample from the same aquifer.
7.2.9 The sampling, storage and transfer of specific groundwater samples shall be carried out in accordance with the requirements of HJ/T 164.
7.3 Collection of surface water samples
7.3.1 When collecting surface water samples, avoid agitating bottom sediment.
7.3.2 In order to reflect the hydraulic connection between surface water and groundwater, the sampling frequency and sampling time of surface water should be as close as possible to groundwater
Sampling consistent.
7.3.3 The collection, storage and circulation of surface water samples shall be carried out in accordance with the requirements of HJ/T 91 and HJ 493.
7.4 Ambient air sample collection
7.4.1 For the sampling of ambient air sample in 3) in 6.2.4, the detection limit of the analytical instrument may be set to have a certain body
Accumulation and equipped with suction holes of the closed positions (sampling when the surface soil has been stripped off the surface of the ground, surrounded by soil closed to protect
Hold closed airtight), closed after 12h gas sample collection.
7.4.2 Specific ambient air sample collection, storage and circulation should be in accordance with HJ/T 194 requirements.
7.5 Site collection of waste samples
7.5.1 Site residual solid waste can be selected with pointed shovels, steel hammer, sampling drill, sampling shovel and other sampling tools
7.5.2 Residual liquid waste in the site can be selected using a sampling spoon, sampling tube, sampling bottle, sampling jar, blender and other tools
7.5.3 The residual semi-solid waste pollutants in the site should be sampled according to the liquidity of solid waste or liquid waste
Sampling requirements for sample collection.
7.5.4 Collection, storage and transfer of specific residual waste samples shall be carried out in accordance with HJ/T 20 and HJ/T 298 requirements.
8 Sample Analysis
8.1 Field Sample Analysis
8.1.1 Qualitative and semi-quantitative analysis using portable analytical equipment during on-site sample analysis.
8.1.2 The temperature of water sample shall be analyzed and tested in the field. Monitoring items such as dissolved oxygen, pH, conductivity, color, turbidity and so on
Head can also be analyzed in the field test, and should maintain the consistency of monitoring time.
8.1.3 The use of portable equipment for qualitative analysis of volatile organic compounds can be contaminated soil placed in airtight containers
In the stability of a certain time after the top of the test container gas.
8.2 Laboratory Sample Analysis
8.2.1 Soil Sample Analysis
Soil samples concerned with the analysis of contaminants should refer to HJ/T 166 in the specified method. Physical and chemical characteristics of soil
Soil pH, particle size distribution, density, porosity, organic matter content, permeability coefficient, cation exchange, etc.
Should be implemented in accordance with GB 50021. Hazardous waste contaminated soil characterization analysis should be in accordance with GB 5085 and HJ/T 298
In the specified method.
8.2.2 Other sample analysis
Groundwater samples, surface water samples, ambient air samples, and residual waste samples shall be analyzed separately according to HJ/T
164, HJ/T 91, GB 3095, GB 14554, GB 5085 and HJ/T 298.
9 quality control and quality assurance
9.1 Sampling process
Sample collection, preservation, transportation, transfer and other processes should establish a complete management process. To avoid sampling equipment and
External environmental conditions and other factors have an impact on the sample should pay attention to the quality assurance and quality control in the field sampling process.
9.1.1 Cross-contamination during sampling should be prevented. During rig sampling, the equipment is to be drilled before drilling the first hole
Cleaning; drilling equipment for drilling a number of consecutive should be cleaned; the same drilling at different depth sampling, drilling
Equipment, sampling device for cleaning; other sampling tools in contact with the soil should also be cleaned when it is reused. Under normal circumstances
Can be cleaned with water, can also be used to be taken soil samples or clean soil for cleaning; when necessary or special circumstances, can be non-phosphorus
Detergent solution, high pressure tap water, deionized water (distilled water) or 10% nitric acid.
9.1.2 Collecting Site Quality Control Samples are an important means of on-site sampling and laboratory quality control. Quality control like a normal package
Including parallel samples, blank samples and transport samples, quality control sample analysis data from sampling to sample transport, storage and data analysis
Different stages reflect the data quality.
9.1.3 During the sampling process, the same kind of sampling medium, should be collected at least one sample acquisition parallel sample. Sample collection parallel sample
Is a sample collected from the same spot and packaged and analyzed separately.
9.1.4 When collecting soil samples for the analysis of volatile organic compounds, it is advisable to collect at least one transport empty per shipment
White-like, that is, from the laboratory to the sampling site, and returned to the laboratory and the transport process-related, and has nothing to do with the analysis
In order to understand whether the transport is contaminated and the sample is lost.
9.1.5 On-site sampling records, on-site monitoring records Tables can be used to describe soil characteristics, suspicious substances or anomalies,
At the same time should keep on-site video records, its content, page number, number should be complete and easy to verify, if any changes should be marked
Change people and time.
9.2 Sample Analysis and Other Processes
Soil, Groundwater, Surface Water, Ambient Air, Sample Analysis of Residual Waste, and Quality Control of Other Processes
The quality assurance technical requirements are in accordance with HJ/T 166, HJ/T 164, HJ/T 91, HJ 493, HJ/T 194, HJ/T 20
Requirements for special monitoring project should be in accordance with the relevant standards require monitoring within a limited time.
10 monitoring report preparation
10.1 The main content of the monitoring report
The monitoring report shall include but not limited to the following. the name of the report, the source of the task, the purpose and basis for its preparation,
Survey and analysis of pollution sources, monitoring objects, monitoring items, monitoring frequency, layout principles and methods, monitoring points
Figure, sampling and analysis methods and time, quality control and quality assurance, evaluation criteria and methods, monitoring results summary table
Wait. It should also include the name of the laboratory, the report number, the number of pages per page and the total number of pages, the sampler, the analyst, the report
System, review, review and issuer and time and other relevant information.
10.2 Data Processing
The processing of monitoring data should be based on the correlation in HJ/T 166, HJ/T 164, HJ/T 194, HJ/T 91, HJ/T 298
Ask for it.
10.3 Monitoring results
Monitoring results can be contaminated sites in accordance with the environmental survey, rehabilitation, engineering acceptance and retrospective assessment of different stages
Requirements and related standards of the technical requirements for monitoring data summary analysis.
Related standard: HJ 25.1-2019    HJ 25.2-2019
Related PDF sample: HJ 57-2017    HJ 212-2017